Levels 3-7 - Test Papers

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2005 KS3 Science Mark Scheme Tiers 3–6 and 5–7 Paper One Tier 3–6 5–7 Q No 15 7 Part Mark Answer Accept Additional guidance a i 1/2d 1 * the number of turns or coils of wire accept ‘the coils’ accept ‘the turns’ a ii 1/2d 1 any one from * the current * the length or thickness or material of the wire or coil * the circumference of the coil * the size of paper-clips accept ‘the voltage or power’ accept ‘the wire’ accept ‘the paper-clips’ accept ‘position of the coil on the nail’ accept ‘tightness of the coil’ accept ‘distance between turns’ accept ‘the nail’ do not accept ‘the number of paper-clips’ a iii 1/2e 1 any one from * count the paper-clips picked up * measure their mass accept ‘number of paper-clips’ accept ‘count them’ accept ‘weigh them’ accept ‘the more clips the stronger the magnet’ accept ‘measure the distance at which a magnet will just pick up a paper-clip’ b 1/2n 1 any one from * an inaccuracy in results * a problem with the data or results * a problem with the method accept a description of inaccuracies, such as ‘she counted the number of clips wrongly’ accept ‘something wrong with the tests’ accept ‘she used different sized paper-clips’ accept ‘the paper-clips were already magnetised’ accept ‘she did something wrong’ ‘the test is unfair’ is insufficient 24
2005 KS3 Science Mark Scheme Tiers 3–6 and 5–7 Paper One Tier 3–6 5–7 Q No 15 7 Part Mark Answer Accept Additional guidance c i 1/2g 1 * ✓ if more than one box is ticked, award no mark c ii 1/2e 1 any one from * with bigger paper-clips she might miss the precise point at which the electromagnet stopped picking up paper-clips * the smaller paper-clips might help to identify the precise point at which the electromagnet stopped picking up paper-clips accept ‘she would pick up differences between the number of turns of the coil’ accept ‘she might not see a change with big paper-clips or she would see a change with smaller paper-clips’ accept ‘it is more precise or more sensitive’ ‘it will pick up a few large paper-clips but a lot of small paper-clips’ is insufficient award a mark for a response identifying that greater precision is possible with smaller increments ‘they are smaller’ is insufficient Total 6 25
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Levels 3-7 - Test Papers

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